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Patent Searching and Data


Title:
MAGNETIZATION DEVICE FOR MAGNETIC ENCODER
Document Type and Number:
WIPO Patent Application WO/2014/027584
Kind Code:
A1
Abstract:
A magnetization device (1) is designed to obtain a magnetic encoder by magnetizing an annular magnetic body (2) integrally having double rows of annular unmagnetized magnetic encoder tracks (3, 4) arranged adjacent to each other while rotating the annular magnetic body. The magnetization device (1) comprises: a magnetization yoke (6) which has a pair of facing ends (6a, 6a) that face each other across a magnetic gap; an excitation coil (7) which is wound around the magnetization yoke (6); a magnetization power source (8) which supplies a magnetization current to the excitation coil (7) and passes a magnetic flux between the facing ends (6a, 6a); and a magnetic shield (9) which is provided in the magnetization yoke (6) and blocks the flow of the magnetic flux to a magnetic encoder track in a row other than a row to be magnetized. This configuration makes is possible to obtain a magnetization device for a magnetic encoder, the magnetization device being able to accurately magnetize double rows of magnetic encoder tracks (3, 4) arranged adjacent to each other without exerting an influence on their adjacent magnetic encoder tracks (3, 4) and achieve a reduction in unnecessary steps, and a compact double row magnetic encoder using this magnetization.

Inventors:
TAKAHASHI, Toru (1578 Higashikaizuka, Iwata-sh, Shizuoka 37, 〒4380037, JP)
UENO, Shintarou (1578 Higashikaizuka, Iwata-sh, Shizuoka 37, 〒4380037, JP)
Application Number:
JP2013/071197
Publication Date:
February 20, 2014
Filing Date:
August 06, 2013
Export Citation:
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Assignee:
NTN CORPORATION (3-17, Kyomachibori 1-chome Nishi-ku, Osaka-sh, Osaka 03, 〒5500003, JP)
International Classes:
G01D5/245; H01F13/00
Foreign References:
JP2010186794A2010-08-26
JP2003059718A2003-02-28
JP2001518608A2001-10-16
JP2002541485A2002-12-03
JPH0658766A1994-03-04
JP2008233069A2008-10-02
JP4024472B22007-12-19
JP2010186794A2010-08-26
Other References:
See also references of EP 2887024A4
Attorney, Agent or Firm:
SUGIMOTO, Shuji et al. (Higobashi Nittai Bldg, 10-2 Edobori 1-chome, Nishi-ku, Osaka-sh, Osaka 02, 〒5500002, JP)
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